Lubricating mechanism for sewing machines



Jan. 31, 1939. J. P. wls ET A1. 2,145,825

LUBRICATING MECHANISM FOR SEWING MACHINES v Filed Nov. so, 1934 4sheets-sheet 2 INVENTOR f6/vz P Waals BY Fmc/IF Zeler NlllllllllllllllllliJ .3

www@ TN Jan. 3 1, 1939. .J. P. wEls 'ET AL LUBRICATING MECHANISM FORSEWING'MACHYINES 4 Smets-sheet a Filed Nov. 30, l19,34

*u ne .-,Petent'ed-Jen. 31, '193s i LUBBICATING ausm srs-ommen ronslt'wnmt sono n'we'u cna mau-lcs r. zene. Nmk. N. rf..v

assignorsto Willcox '& Gibbs sewingV Machine Company, New York New York.N. Y., a'. corporation of "e .Applicaties November, im, No. :sans

ze. cmu (ci. 1st-s) g This invention' relates to improvements inlubricating mechanisms' primarilvfor sewing machines, and is acontinuationl in part" of our application Serial No. '745,343,1iledSept. 24, 1934. f It is an object of the present inventionto proevide animproved system and mechanism for, automatically lubricating variousoperating instrumentalitiesfso that the machine may be made morecompact, and whereby the speed, eillciency.u

1 0-and effectiveness of the machine may be' erihanced.

It is another object of the present invention to;

lprovide improved mechanism fordistributing oil to the various operatingparts;

usv Features in connection with this object include the provisionofnovel inverted or'hanging variesv along' which the ou may treve1 en d bedirected to predetermined locations orbearings, and the provision of anovel distributor pan f or regulating and directing the iiow of oil tomain,operating` connections. ,This feature also has the advantage ofinsuring a feed of oil to various bearings and the like for aconsiderable period `after the ma# 'chine is stopped, thereby improvingthe easy starting characteristics of the sewingmachine. j

Yet-another object of the present invention is.

y the provision of improved pumping apparatus for forcingv thefoil froma low collectin point to a hig'h distributing point.

Features in connection with .this- 'object are the provision of a novelpump which may be made integral with the bottom plateofv the chamber soas 'to belremoved therewith, Awherebya worn or broken pump orparts'thereof may be easily or 35,quickly replaced without' disturbingother instrumentality in the machine.

yA further feature in connection withtmsobject' Y is tln'e'provision ofan oil pump made'in large part.

from the regular operating instrumentalities in .the sewing machinethereby's'aving the expense lof a separate ou pump and particularlvindismissing'v with separate and intermediate or indirect drivingconnections for 'a separate oil pump.

Because it -is very important that-a high speed -sewing machine `be'properly lubricated yetall4 times, it is an important object of theApresentv invention to provide means so that the operator l may beapprised or may check the condition,

' nature. and extent of lubrication. f

substantially exposed to view for indicating the nature and extentofoil. eduction, located in an l 'accessible-and. at all 'timesvi'siblelocation, and

ASome of the features inlconnection with last object include the'provision of' a glass-.plate bodiment,

oil in the oil-chamber which. in the present emlso serves both as awallto the oil. chamber and as a gauge plate for indicating the extentof feed or the number f stitches per inch.

A It is another object of the present invention'to s provide a forcedeedof'lubricant through, preferably without separate pipe lines,` to remotebear- -A feature in this connection'is the provision of valves on theends of operating rods adapted to l0- permit pil to be forced therein atpredetermined times. and which may be used either with orwithoutgravityfeedofoil. l I

Beretofore it vhas-been customary to provide so called gear orcentrifugal pumps for lifting and wl forcing oil to the variousoperating parts and it has beenl thought impractical to use a plungertipe pump for thisv purpose. However, the prese t invention provides twovery practical reciprocating or plunger type pumps and discloses a novel20 means to a smooth rather than a pulsating Fig. 3 is ya. longitudinalsection taken on line ao, l-l in Figfl. but shows the cloth plateremoved fromy the lower arm.

Fig. 4 is a vertical section view through Athe head end of the machine,taken on line 4-4 in Fig. 1.

Fig. 5 is avertlcal section view taken on line zu;A

. lllig. 6 is a longitudinal section view of acrank arm. t

ng. 'l i's a fragmentary view of one form of oil1 pump provided by thepresent invention, similar 40 to that shown in 1, but in section.

.i Pig. 'lA is a sectional detail of amodiiied plug andvalve.- f

8 is a fragmentary view of the looper mechanismat the lhead end of themachine. v

Fig. 9 is a fragmentary view of another4 form of Mg. 10 is aview ofthe'oil level indicating plate. Fig. l1 is a top plan view of the formof pump Fig. yl2 is asoctional view of the pumpshown- 1I-1g. is u e.aetscned viewcitnecu distributor muentinvention'isnot iimitedtothe de-v.f

tails of construction and arrangement of parts illustrated in theaccompanying drawings because the principles of the invention arecapable of other embodiments, and the phra'seology employed is for thepurpose of description and not for limitation.

Although the improvements in lubricating mechanisms of the presentinvention are capable' of use in various sewing machines, and in othermachines, they are particularly advantageous and useful with the sewingmachine illustrated and described in detail in our eopending applicationSerial No. '145,343 filed September24, 1934. and are thereforeillustrated and described in such relation herein.

In the detailed description which follows various main parts or mainmechanisms in the sewing machine are described in considerable detail inseparate headed sections in order to cle'arly disclose the purposes ofthe improved lubricating mechanisms of the present invention andin orderto facilitate a quick understanding thereof. Frame and general structureReferringnow'in detail to the drawings, particularly to the generalstructure shown in Figs.

provides va substantially rectangular in cross'section withy transversewebs 26 and 21 for supporting aneedle operating rod 28 insuitable'bearings 29 and 30. At its outer end the upper arm 2| `isprovided with a head 3| for supporting a. presser bar 32 and needle bar33 in suitable bearings 314 and 35 respectively for reciprocationrelative to the lower arm 22.

A finger 36 is secured to the link connection 31 to the needle bar 33 inorder to reciprocate the latter.v -A hand leveri38, see- Fig. 4, pivotedon astud 39 has a cam 38' for engaging an 'arm 48 on the presser bar 32in order, to raise a presser foot 4| at the lower. end thereof away fromlthe lower arm 22.

The lower arm 22 also houses or supports alooper mechanism 42 and afeeding mechanism 43, but itis substantially'open inorder to facilitatechang ng, repairing, and adjusting vari- I ous .parts of hesemechanismsas may be seen best in Figs. 1, 3', 4, and 5. Although it'may .be madeas a separate part and secured to the hollow chamber 23 it is preferablymade integral therewith as shown with a horizontally extending frontwall 44and rear wall 45 and' with a transverse end wall 46, andintermediate wall 41 pref-` erably extending fully between front andrear walls in order to provide a rigid support.

The Vlooper mechanism- 42, shown in-Figs.\1, 3,

and i is of the s'o-called transverse looper (or, llooper operatingacross the line of feed) type and comprises a looper carrier 48 f0rmingan interchangeable mount for various loopers 49, and

having needle loop taking travel from' the full line to the dot-and-dashline position shown in Fig. 4. .The sleeye is capable` of rocking move'-ment onen upper rod but is held against axial v outer end of the needleoperating rod' 28 and is provided with a or sliding movement thereonby apair of collars 52, this rocking movement being accomplishedautomatically through a lower connection 53 to a lower or rocking rod54, shownin Figs. 1 and 4. Needle loop taking travel is eected throughautomatic reciprocation of -the upper rod 55.'

Because the lower and upperlooper rods 54 and 55 operate at very highspeeds during the normal operation of the sewing machine, it isdesirable that theyl be sturdily supported and'well lubricated, and thelower arm 22 'provided by the present invention and lubrication,mechanism also provided by the ypresent invention are arranged toaccomplish this in a marked degree.

Support thereof is accomplished through the provision of suitablebearings 56, 51, 58 and 59 for the upper rod 55 and similar bearings 60,6|, 62, and 63 for the lower rod 54 in the wall 46 intermediate Wall 41.and in the hollow chamber side walls 64 and 65 respectively. Thebearings 51 andf 6| in the intermediate wall 41, or bearings 56 and 69in the' outer endwall 46 may be dispensed with; however, because thereis considerable inertia transmitted indirectly to the operating rodswhen the looper carrierl 48 is rocked four thousand or more times perminute, it is desirable to steadily support the rods and to this end itis 'preferable that the disclosed plurality of bearings be used.

The feeding mec nism 43 comprises a feed dog 66 mounted on a springconnection 68 to a linger 69 secured to a feed rockerrod 10 by -a yokeconnection 69 and having a flat spring 1| and coil spring 12 connectionto a finger 13 secured to a feed lift rod by a yoke connection 13'. .IFour motion travel is imparted to the feed dog 66. when thev feed liftand feed rock rods 14 and 10 are operated a predetermined extent,preferably timed in a manner to move materials when the needle 15 is inraised and free position relative-to the ma terials between thepresserfoot 4| and the feed dog 66.

A main drive mechanism 16 about to be described in.considerable .detailis provided to impart predetermined and coordinate movement to the rods28, 54, 55, 10, and 14 in order to reciprocate the needle 15 and toimpart vfour motion operation to the looper 49 and to the feedingmechanism 43 all in timed relation, one relative to the other, l

Worksuppm't a feed dog carrier `61 having A worksupport 11 of thepresent sewing machine includes a large cloth plate 18, for example, onbosses 19 of the lower arm'22 and secured thereto by suitable screws 80.linv adaptor 8| within a U-shaped cut-out 18' in the cloth plate is alsoadapted to rest upon some of these bosses to vsupport interchangeablethroat plates 82'havbo ing cut-outs 83to accommodate variously shapedfeed dogs 66. 'I'he machine is capable of accmmodating a large varietyof cloth plates and throat plates so that the machine may be readily*converted from a single line to multiple lne cloth stitching, and moreparticularly so that` it may visionalapplication Serial No. 750,259filed Oc- -tober 27, 1934. Y -Drivingmechansm and operating connectionsI be converted from a feed across the arm to a cylindricalor lfeedaround the arm type of machine; the structures and features thereofbeing more completely disclosed and described in a di- -ported in ahorizontal-.plane height of the hollow cham-V by 'a ball bearing 85within awa-sais ing a plurality of cranks A, B, C,l D, and 'E'.supsubstantial1y"mid wayin the vertical ber 28,' at one end a suitablebore 88 in the wall 04 and being sealed against oil leakage at thispoint by a cover plate 81. At -its opposite end the mainshaft lissupported preferably with a ball bearing 80v iny a large cover plate 89as may'be seen-best in Fig. 1,

the latter in turn being supported within'a large` bore 90 by screws89'.

Crank 'arm 9| has' a bearing connection 82 with crank A at its lower endand has -another bearing connection y98 to a stud 94 at the outer end ofan arm 95 carriedby the needle operating `rod. A short crank arm 90,havingza connection 91'to the crank B, and connection 98 to abeli crank99- pivotally mounted ons cross rod |08 and in turn connected to theupper -rod 55 by a con-M Vnection |I, yis provided to reciprocate theupper other crank arm |02 isconnected to the crank C at its upper endthrough abearing |08,

.and at its lower end. is, through a connection |04,

associated with an armsecured to the lower rod 54 by a suitable yokeinorder to impart rock` 'fing movement thereto:- the .crank arms 98-andv|02 being adapted to impart eliptical or four wavt travel or movementto the looper 49.` f

Crank arm connections are also provided to impart suitable movement tothe feeding mechanismi 43, viz.,. a crank a'rm |08 has a connection *|01with a crank'D atits upper vehd'and has a connection |08 to an arm |00secured to the feed lift'rod 14. Another crankarfn ||0 has a-confnection |I`|to the crank E' at its upper end and through a link |I2 atits lower end is connected f per inch. This adjusting mechanism is veryto an arm' ||3 secured to the feed rocker. rod 10.

.An .adjusting'mechanism I I4 is provided to' shifta pivot ||5lengthwiseof the crank arm I|0 in vorder to vary 'the extent of feedrocking movement and thereb'y to vary the number of stitches completelydescribed inthe copending application Serial No. '147,811 led .October1l, 1934.

However, it-.shouldbe particularly noted that the adjusting mechanismincludes a pointer ||8 adapted to'be moved vertically as the -pivot studv I I5 vis moved vertically by a screw I i1 connected to a carrierblock- I I8.

" The cranks A through E are lsoproportioned that coordinate movement isimparted through -the operating -connectionsjust describedin detail tothe needle 1l, looper meehanisnif'42, 'and feedinggmechanism 48.VVarious adjustments may be andare provided for the looperimechaf nismvand the needle but detailed description is omitted at `this pointbecause such adjustments i have no bearingupon the lubricatingmechanisms.

forming the main subject matter of the present application. For similarreasons further descrip- .'tio'n of multiple needle and; rnultiplelooper ar rangements are not given herein.

Lubcatinq mechanism I It a fundamental aim inthe dvelopment of'. theoiling mechanism comprising'the present viii-- vention to lubricate, yautomatically', v.substantially especiallyto lubricate automatically thepresent invention.

rlocations. for example 'through f capillary action, the thereof.-

. A novel mechanism Werl'ying the all the moving P rts in thesewingmachine, and main' bearings thereof in a very en icient rliann er.A This is accomplishedwith a combination force, gravity, capillary,spray feed of oil to the varic'mliv -parts with novel-mechanismprovided' by the To this end the/hollow trunk 28- forms a sub-Astantially encioed'chamber, and. forms a lower ormain reservoir ||8 atthe bottom thereof Afor storing the supply of oil orv other lubricant|20.

However, inorder for the oil to serve itspurpose -it must be directed tothe various operating in- .strumentalities in an even and' u nfailingmanner. l

Accordingly, A the present invention provides pumps |2|, |22, and.'|28,each hereinafter described in detail, either of which is adapted to drawthe oil from the ,reservoir ||9 and force it upwardly through aneduction tube |24 to the very top ofthe hollow under side of a .glassplate |25 and of the top plate 24 in such manner that the bulk of theoil -will fall back intoan upper reservoir |15. and so that some of itwill now by gravity and partly by the force feed of the oil as it isexpelled from the top of the eduction tube over the under side. of thetop plate.

' Somev of this oil flows along vanes |21 on the underside of the topplate and at the lowest point thereof collects into drops |28 to fall inprede-- termined locations upon movable parts, or runs through channelsor vanes |80 down along the sidewalls of the chamber to otherpredetermined aligned hols |3I inthe bearing 29 andneedle operating rod28 for passage directly into the latterv rod where, by il ows toward theouter end flow of .oil to the outer end. Auxiliary oil holes |90 areprovided in the upper arm 2| for manual oiling under specialconditions..

Fig. 6 clearly illustrates how oil may be passed directly to one bearingfrom another or to another-operating connection. As may be seen best inFigs. l, 2, and 6, drops of oil |28 ilow from the 'vane |21. into theentrance port |31 in the top cap 98 of a bearing 98 to thoroughlylubricate no' down through a channel- |98 into the other bearingconnection '92 rto thoroughly lubricate the'crank A of the main shaft84. The same feature is Vpreferably embodied in the othercrank arms 88,|82, |08,- and |I0 so that oilv passing into similar entrance ports |81-of these respective crank arms is directedilrst to the cranks v B, C, D,and E', thenceyto the connections 98,

|84, |00, and |`|2.

isprovided for passing oil t9 the cranks B thro h E and to theassociated operating connections. This mechanism com--v prises-adistributor pan |89, see Figs. l and 13, preferably secured to-the side-wall V85 in any suitable manner, as in aside wall individual .cranks Athrough E in such 'manner lished to each vcrank and so that asubstantially "equal amount'vof oil is passed tov each of the necessary.the vdisprovided withl a felt the hibri- -f .Although not. absolutelytributor pan' is preferably or similar pad |48 adopted to retain chamberA23, against the Y the stud within the two upper caps and thence byscrews through holes |40 |4I, and provided with spouts |42v that .a dripfeed ofoil is estab- 4.` cant so that there will be a dripping of oil orfurther feed thereof to the different cranks after vthe machine isdefinitely stopped, thereby forming an accumulation of oll on thevariouscranks and other connections which facilitates quickl starting of theunit after it has been stopped for a time. For example, the cranks havea tendency to thin the 011 and to hold the very minimum o f oil when themachine has been` run for a considerable period of time and the variousoperating parts and the oil have become heated. However, the felt pad|43 and the dis-4 tributor pan retain a body of oil sufficiently long topermit the various operating parts and the.

oil to cool oif and to drop the oil onto the cooled operating parts aconsiderable period of time after the machine is stopped and possiblyuntil it is started again if there is no great lapse of time. Thus, itwill be seen that the distributor pan |39 provided by the presentinvention oils approximately nine main bearings, including cranks Athrough E and connections 98, |04, |08, and and does this lfor aconsiderable period of time after the sewing machine is stopped.

The main bearings 85 and 88 for the main drive shaft 84, because theyare, ball bearings and the friction very slight, require but very isthrown from the cranks-A through E and a considerable amount thereofreaches thetwo main bearings. i

Also, much of the surplus oil dripping from the top 24 onto -the arm 95of the upper rod is thrown about in the hollowv chamber 23 with aportion of'it also reaching the main bearings.l The end caps 81 and 89prevent surplus oil from passingoutwardly of the hollow chamber. Any

conventional oil retainer |44 may also be provided to prevent oilleakage through the chamber. 'A director plate |45 secured to the sidewall 64 with a screw |46, as shown in Fig. 1, collects loil running downover the side wall 64 or drip- 60, mechanism is lubricated in ping downfrom crank A, and is preferably provided with notches adapted to directthe oll to the connections 98 and [0| of the bellcrank 99. An aperture|41 'in thel top of the main bearing section |48 of the bell crank 99,see Fig. 3, receives oil both from the plate |45 and -from spray ordrippings within the chamber 23 crank 'thoroughly l in order tolubricate the bell while it is rocked on the cross rod |00.

The upper or reciprocating rodof the looper the mechanism of the presentinvention, and may be' seen best in Figs. In its present preferred formit comprises one or more openings |49 at the top of the hollow rod 55,as shown in Figs. 1, 3, and '1 particularly adapted to receive drippingsof oil or oil spray being thrown about in the hollow chamber 23.

to receive oil owing down over the side walls,

or to receive oil from the .collector plate |415 from a channel |50thereon as indicated by dotand-da'sh lines in Fig. 1. Oil Venteringthese apertures iiows by capillary action lengthwise of the rod andAthrough a plurality of oil escape holes |5|,-see Figs. '1,' 8, and 9,to the a novel manner by main bearings 56, 51, and58 where fulldistribution is further effected by the provision of oil -grooves |52 inthe bearings, Suitable plugs |53 are provided at both ends of the hollowrod 55; the one on the end of the rod within the hollow chamber 23, seeFigs. 1 and '1,' insures a flow of oil toward the outer end of the rodnear the looper mechanism` 42, and the plug at the outer end thereof asshown in Fig. 8 prevents adverse escape of the oil outwardly of themachine, An air escape hole |532 near the latter plugfacilitates passageof oil lengthwise of the rod and to the various outer bearings.

Lubrication ofthe looper mechanism 42'is also eiected by the upper rod55. For this purpose, the rod is provided with one or more oil escape.holes |54, see Fig. 8, intermediate the transverse walls 46 and 41 sothat oill escapes to the sleeve 5| of the looper carrier. 48 tolubricate the collar during the rocking movement imparted bytheconnections 98 and '|04' in the manner hereinbefore described.Suilicient oil escapes lengthwise of the sleeve 5| to reach the collars52 thereby minimizing the friction between the sleeve and collars. Ifpreferred `the lower arm 22 may be made in the form of a pocket |56 atthis point as shown by dot-and-dash lines in Fig. 1 to collect oildrippings, should there be any. Howeven the possibility of this is soslight, and the advantage of clearing lint from below the needle andlooper'is soimportant,A

that in thevpreferred structure an opening |51 is provided. l

Oil escape holes |5'| similar to those for the bearings 56, 51, and 58may be provided at the right hand end of the upper rod 55 for thebearing 59, but it is preferably provided with an oil entrance hole |58at the top'of the bearing adaptedto pass oil directly to the rod as itis reciprocated'. .A

A veryv similar oil distributing mechanism is -provided for the lower orrocking rod 54 of the looper mechanism 42 for `it too is provided witholl entrance holes |60 within the hollow chamber 23 and with oil escapeholes |6| to'all four ,bearings 60 through 63. Also, the bearings arepreferably provided with grooves |62,to insure thorough distribution ofoil, and the endsv of the rod are provided with plugs |63 andan airescape aperture |64 to insure proper distribution of oil.

The reservoir ||9 may be iilled with oil or other lubricant |20 byremoving the top plate 24, or through'an entrance cup 24' Fig. 4, andmay be drained The rod with a petcock 25'. |00 may be open on the endsto provide circulation of air within the 'chamber 23,-

or may be sealed on the inside end and be pro'- vided withair holes |00'on the bottom, to circulate air and thereby` cool oil chamber.

As may be seen best in Figli and particularlyV Fig. 8, the lower rod isalso provided with an oil escape aperture |65 adapted'to pass oil to theoperating'. connection 53, as bysmall drippings to av ball and socketsection 53' thereof.

Similar mechanism is valso provided for lubricating the main bearings ofthe'feed mechanism 43. Fig. 3 illustrates how the feed rock rod 10 isprovided with oil entrance holes |66'and how the feed lifter rod 14 isprovided with similar oil ber 23 and vto direct such collected oil intothe shown in within the entrance holes |61. A plate, similar to theplate A cuter ends -of the lift and rock rods the feed lift rod -and ofthe feed rock rod is the'same as distribution of oilto the bearings 604through 03 of the--=lower rod 54-of the looper mechanism 42 andhencedetailed illustration and description thereof 4seems unnecessary.Air -I escape holes |10 and '-|1| are provided nearv the u and 1orespectively to insure. proper capillary now of oil to the outer endslof the rods for proper lubrication cf the bearings at thereof. Ifpreferred, any or all of the hollow rods 20, 54, 55, 10, and 14 may beprovided with wicks to retain and evenly feed oil to the variousbearings.' Also, the machine may be secured to a bench or table at aslight angle so that the end thereof i s slightly lower than end,thereby promoting a flow of 'oil by gravity to'the outer' ends. Inpassing it should be noted too that separate bearings may be dispensedwith andproperly bored holes Din the frame 20 itself' forvthe rods mayserve as bearings within the purview of this invention, the differentoil escape holes passing bearings. -V f Should anyof the oil passingholes, for example the oil entrance port |31 or channel In on the crankarm 9| or of any other crank! arm become clogged, there will always besumcient oil supply and oil drippings to lubcate the operatinginstrumentalities within the hollow chamber, espe- 'ciallyl since thevarious parts therein are operv455 Essentially -this form of pump.comprises 'a' -cylinder59' formedby themain bearing 59 and a ated athigh speeds, so that there is in effect a A ,v `double piling 'systemprovidedby'the present in vention, viz., the direct oiling through thevarious V vention provides severalnovel forms of oil pumps. One formof'puxnp |2 I, illustrated in Figs.-1 and '1 particularly,

. ofthe main operating instrumentalities, .to the "end that definiteeconomies in manufacturing costs may belgaccomplished andsthat operating'1 advantages will definitely result, viz., the oil pump absolutely willfunction when the 'operating'instrumentalities areworking and whenlubrication `isfrequired most'. Further, there ping of belts, breakingof chain, elciencies as occur when a separatepump with an intermediatedriving connection is provided.

l plunger 55 formed by the '-55-with anwinlet` valve adapted to properly1 end of the upper rod |12 and outlet valvev |13 control 'passage ofoil.

70/ 'Although the cylinder 59 may be made with an integral head, it isprefeablygprovided with-a scr/ev' |14 in order to machining -of the'interior bearing surface. The

plug |52 in' theright hand end of` the' upper rod. 75 55, as shown inllg. '1, serves the outer extremities outer v the chamber oilA directlyto such bored e instrumentalities just described in detail, andtheindirect .oiling eected through theispray system.

ating mechanisms at' all times the present in-` is made as asubstantially integral 'part 'of the sewing machine itself, and fromsome` can be no slipf and other inf facilitate` the giilidfngor to close:the hollow end of the rod and to convert this rod into a plunger inorder to create a suctioncapable of drawing .oil from the oil reservoirIl! and to create pressure adapted to force the oil up wardly throughthe eduction tube |24 'to an upper oil reservoirlll.

Operation of the pump |2| is as follows: as the upper rod 55 isreciprocated by the crank B, crank arm 96, and bell crank needle looptaking travelto the-looper 48, the

' plunger 55' is'reciprocated within 'the cylinder v, pressure chamber|16 embraces the section between the pump inlet valve |12 and the pumpoutqlet valve |12 and therefore includes both the cylinder 59 at the endof the upper rod 55 and the chamber at the end of the lower rod 54,which latter chamber is freely connected to the cylinder 59' by alinedapertures in the frame and in the bearing'59. Thence asthe rod isvreciprocated in the other direction, a's in the direction of the arrowH of Fig. 1, oil pressure is initially built up v in the pressurechamber to again tightly close the inlet valve and upon further movementopens the outlet valve |13 and forces the oil upwardly through theeduction tube |24 to the upperoil reservoir |15. When the plungerreaches (the end of its travel in the right hand directionga'ndinitially starts its travel to the left again, the

oil pressure'in the eduction tube |24' and the initial suction closesthe outlet valve |13 to prevent return of the oilintothe pump again.Constant reclprocation of the piston inJthe cylinder 59' insures asubstantially constant supply of lubricantl to the upper oil reservoir.Y In order to equalize 'the flow -of ilto the upper level a coil |11,'see Fig. 5, is provided in the eduction Atube |24. 'Il'liis tends tochange Athe pulsations or short spouting action of the oil into asubstantially even now. For similar purposes a baille |18` as shown inFig. 1 may be provided in the eduction tube |24. v

Thus. the present invention 'provides a very efficient pump adaptedtolift the oil from the lower or main reservoir H8 to the top' 24 of thehollow chamber`23'4 for further distribution in' themanner herelnbeforedescribed in detail and doesthis without the expense of a separate'addi- 'tional pump and in-a manner to insure con'- vfeed .of oil intoand through theoperating rods.'

As illustrated in the accompanying drawings the 99 in order to impartmachine is arranged yforthisvforced feed to the lower and upper 55respectively, and this is accomplished vby. merely using the modifiedplug' |53' illustrated in Fig. Z-A in place of the/'plainplugs |53 and|83 at the-right hand ends of the rods at-presl'lg. 7.' 'I'his modifiedforni of plug is provided-witha very small inlet Dort |19 andv ent shownin' with a valve4 Ill including an integral bore ISILsupportingaspring-|82 adaptedto push a ball |83 against a valve seat|04, with the end of the -b`o're spun overto form a flange |85 adaptedt`o --hold the spring and ball in place. These'valves eifectivelyseat'the inlet ports |19 when the rod looper operating rods 54 and ofthe inlet holes may be closed sovthat force i'eed alone is 55 isreclprocated in'tlietdirection of the arrow G'in Fig. 7 so thatthesuction action of the pump is in no way impeded `and openautomatically by oil pressure in the pressure chamber |19 when thereciprocating rod is gi`en a pressure stroke in the direction ofthe'arrowig. Because the consumption of oil by the various bearingsthroughout the rods 54 and 551s very light and because it is desirableto have a heavy ow of oilto the top of the trunk, the eduction tube |24and the valve |13 are preferably made of large size to permit the bulkof oil |20, from ,the pressure stroke-of the pump, to pass upwardly forgeneral distribution, and the inlet ports |19 of the modiiled plug |53'are made extremely small so that there will be just a slight amount ofoil passed into the operating rods. The size port may be proportioned toobtain any desired amount of lubricant. Preferably. though; it isproportioned to receive buta slight proportion of the oil moved by thepump'.

= This forced oil feed for the operating rods may be used in conjunctionwith the gravity feed provided 'by the entrance ports |50 and |50 inthet4 top of the rods 55 and 54 or these oil entrance provided. Further,suitable holes may be drilled through the frame 20 to Join the otheroperating rods, for example the operating rods 10 and 14 for the feedingmechanism 43 sojthat they in turn may be lubricated by forced feed inlike manner. A v

A modified form of pump" |22 of the reciprocating plunger"type\isillustrated in Figs. 5, 1l, and 12, having its Vintegral with a modiedbottom plate 25 in such manner that the complete pump may be easily andquickly removedfrom the sewing machine for repairs 'and adjustments bying the bottomplate.

- In detail, this form of pumpcomprises an inlet valve |01, an outletvalve |13, screwed upon or' otherwise secured to the main body portio v|05 at inlet and outlet-portsl Vlas and m respec veli' and with anintermediate cylinder supporting a plunger |9I. The latter is preferablyprovided with *a` bore |92 adapted to receive a coil spring |93 for thepurpose of lifting the plunger in the cylinder. An outlet valve |13 isconnected to the outlet port |89 by a regular pipe coupling |94. Thebottoni plate 25', including the pump unit |22, issecured to thesuitable fastening screws. Y

' Operation of this form of the invention is pref' era'blyaccomplishedby the provision of a linger |95 securedto the lower rockingrod 54 as by a yoke 54'. 'I'he finger overlies the plunger Ill,- andpushes the latter downwardly whenever the rod 54 is given a clockwisemovement as viewed the boil from the outlet valve mK toward its seat- 1ingsurface. Next,-as the plungeris moved downwardly` by the ilnger '|95the pressure built up thereby forces the ball "seat, and releases theoutlet valveV |12 to eifect main body portion I made' merely removhollowchamber 2l by description an .or all of the modes o f its drivingconnections;

of the inletvalve to its Y a to the lower operating rods, adisplcementof lubricant upwardly through the audace in detail with pump |2|, may beused with this 5 form of pump also, in 'order to have a compara- -tivelysmooth ilow of oil to the upper distributing points rather than apulsating or spouting ow. 'A sliding connection |91 is provided betweenthe top end of the eduction tube |24 oil reservoir so that this tube may'be simply slid out of the hollow chamber 23 with the pump |22 when thebottom plate 25 is disconnected, and vice versa.

A ilnal form of 9. It comprises a circular body member |99 adapted to bepassed into a bore |99 in the side wall 65 of theframe 20. v The bodymember is provided with a pair of bores |99 adapted to reand the upper10 pump |23 is illustrated in `Fig. 15

ceive a pair of gears 200one being provided with 20 gears are rotated,oil is 2 |23 and of the gears 200 is provided by any suit- 30 able belt201 or like connection extending to a circular groove 208 section ofthemain' drive pulley. Y

Although this pump provides a very economical construction it is not as7fool proof and positive 3 in its action as the two novel forms of thepump |2| and |22 hereinbefore described, Vfor the belt 201 may break orslip without the :operator beingaware voi' it and thereby, cause theoilfsupply to fail.

chamber 23 may be provided with an integral glass wall 209 in the'formof a sight and gauge for viewing and checking the conditionvand .thelevel of the'oil, the latter being accomplished by the 4 vprovision ofan oil level line and the same glass being provided with a graduatedscale 2| cooperating with a pointer H9 to v indicate the'extent of feedand consequently the number of stitches per inch.A This glass also, ineffect, forms a side wall to the hollow chamber.

ItV should be noted that-the novel pump |2|, wherein fa bearing is usedas a. pump cylinder "and a, main operating rod serves the ancillarypurpdie of a plunger 4for the pump, may be used As illustrated 1u Figs.5 and 1o the hollow 4 zio on the glossN equally vwell with othermachines, and the present 55 d claims are intended to cover suchdifferent use. v Other variiltions and modifications may be` made withint tions of the inventionmay be used without others.

-Having thus explained the nature ofour said invention and described a.way of constructing and Y usingthe same, although without attempting toset forth all the forms in u'se, we claim:

1. In a sewing machine the combination of a Y frame; a hollow chamber insaid frame; a main ,drive shaft with cranks; lower operating rods withmain' .drive shafti meansfforflifting oil-from the bottom of saidchamber to the distributor pan; and crank arms connecting said maindrive shaft t hollow, through. their length, adapted to receive oil escope of this invention and por- -60 which it may be made',4 35"- adistributor pan above the 70 from the distributor 1',

l Ylio ing oil to the operatinginstrumentalities and dri!- forliftingoil from the driving connections of the crank armsto thev a mainoil reservoir; a main 4drive shaft with cranks; lower operating rods; anupper operating rod; an upper oil reservoir; means for lifting oil fromsaid'rnain oil reservoir and directing it to said' upper operating rodand said lower operating rods, and to the upper' oil reservoir; and adistributor pan overlying said main drive shaft adapted to receivevoilfrom the vupper -oil reser- -"voir and to direct oil to the cranks onthe main driveshaft.

3. In a sewing machine the combination of a framev with a bore in theside wall thereof; a

' main oil reservoir'in said frame; a top plate; a

` main idrive shaft. with cranks; lower operating operating rod and saidlower operating rods and 'to rods; an upper operating rod ;.an upper oilreservoir; and a gearpumpsupported in the bore of the frame ior liftingoil lfrom said main-oil reservoir to said top vplatefor. distributing ittosaid upper said upper oil" reservoir; and a distributor pan adapted toreceive oil from the upper reservoir and to direct the oiltothe crankson the main drive shaft.

4. In a sewing machine the combination of a frame for supportingoperating instrumentalities and driving connections; means foi`distributing oil to the operating instrumentalities and the drivingconnections; an oil pump for lifting oil vfrom a low to a high levelinthe frame for distribution by said means; anda -looper operating rodin said instrumentalities forming a plunger for said pnmp.v

.5. In a sewing -machinethe combination of a frame for supportingoperating instrumentalities and driving connections; means fordistributing connections; an oil pump Y a low t'o a.` high level in theframefordistribu-B tion by said means; a bearing in the frame formfingacylinder for the pump; and a reciprocating' rod for lperforming mainoperatingfunctions in the sewing 4machine supported in said bearing andadapted to perform the ancillary function of a lpiungerfor the pump. y a

6. In a sewing machine the combination of a frame for suppontingoperating instrumentalities said pressure chambers;

`valves in said rods, controlling the ilow of -lubriand drivingconnections; means for distributing oil to the operatinginstrumentalities and driving connections; an oil pump for lifting oilfrom a low to ka high level in theframe for vdistribution by said meansincluding a pair of main bearings in l said frame adapted to Aformafpr'essure chamber,

for the pump; and a reciprocating main rod in one of'said bearingsforming a plunger yfor lthe so I pumpv '1. lIn asewing lmachine thecombination of a frame; connected pressure chambersin said frame,. forlubricant; a plurality ofv hollow rods with outlet holes, respectivelyextending into bearings for said rods;

cant .from said pressure chambers; and means' for reciprocating one ofsaid rods to create a pressure of lubricant in said pressure chambersand concurrently yopen said ,valves and force lubricant therethrough andto-the bearings.

il. Ina sewing machine the combination of a frame' for supportingoperating vinstrumentalities and drivinglconnections; a reservoirfor-lubricant.; a hollow operating rod for operating a ananas l the rodand main instrumentality1 and to operate the pump.

sewing instrumentality; having` an -oil escape hole; bearings for saidrod; means for pumping lubricant from said reservoir; and a valve insaid rod associated -with said means to effect force feed of lubricantinto said rod, through said 5 escape hole andlto the bearings.

. 9. Ina ng machine the combination of a frame for supporting operatingconnections; a rocking rod supported by said frame adapted to actuate amain operating instrumentality; a hollow chamberin said frame, formingan oil reservoir; a bottom plate for said hollow chamber; means fordistributing oil to the operating ccnnections;.a pump carried by saidbottom plate and having a vertically disposed plunger for lifting oil tosaid distributing means; and a finger on said rocking rod overlying theplunger and adapted -to perform theauxiliary function of operating thepump while the rocking rod performs the nain function of actuating amain operating' instrumentality.

10. Ina sewing machine the combination of a frame; a hollow chamber; abottom plate forsaid chamber; a drive shaft; a crank on said driveshaft; an operating rod for a' main operating in-J25 strumentallty; apump on said plate; means having only one connection to only one crankon the main driv'eshaft adapted to concurrently operate the Dump. 30

11. In a sewing machine the combination of a frame; a hollow chamber insaid frame for sup-l porting operating instrumentalities and forming ancil chamber; a top to 'said hollow chamber; a

l horizontally disposed 'glass plate carried'by said 35 l top; conduitmeans for directing oil from said oil chamber to the underside. of saidglass plate; and means for pumping oil from the bottom Iof said chamberthrough said conduit means and expelling the same against the undersideof said glass plate 40 to diffuse .and to distribute the oil to -saidoperating instrumentalities. v

. l2. In-a sewing machine the combination of a frame; an oilreservoir;means for distributing oil to operating instrumentalities; an oil pumpforni? ,moving oil froml said reservoir to said-means; and

a main operating rod for performing a main oper ating function andcooperating with said pump' to perform the ancillary function of aplunger for 60 13. In a sewing machine the combination of a frame; anoil reservoir; means fordistributing oil to -operating instnimentalitian oil pump formoving oil from said .reserv ir to said means; a' bearingin said frame forming a cylinder for said 55 pump; and a reciprocatingrod for performing a main operating function, supported in andcooperating with said bearing to perform the ancillary function of,aplunger for the pump.4

1`4. Ina sewing machine the combination of a 00 frame; a hollow chamberin said -frame forming a main oilfreservoir; a top for said chamber; anoil directing vane on said top; a main drive shaft with cranks; meansfor lifting oil from said raserv voirand educting it against theunderside of the 65 top for partial distribution Vby said vane; anVupper 'oilre'servoir near the point of eductionadapted to l collect oilwhich drops from the top; a distributor pan overlying said main driveshafts; ja plurality of-spouts in said distributor pan overlying indi-70 vidual cranks on the main drive shaft; and means for cunziucting oilfrom said upper'oil reservoir toy -said distributorpan.' 15. In amachine the combination o f a frame; a hollow chamber in said frameforming 76 a main-oil reservoir; a top for said chamber. having .anopeningthrough which the ow of oil may be observed; a glass insertforming a closure for said opening; an oil directing vane on said'top; amain drive shaft with cranks; means for lifting oil from said reservoirand educting it against the underside of the top for partialdistribution by said vane; an upper4r oil reservoir near the point ofeductionv adapted to collect oil which drops from the top; a distributorpan overlying said main drive shafts; a plurality of spouts in saiddistributor pan overlying individual cranks on the main drive shaft; andmeans for conducting oil from said upper oil reservoir to saiddistributor pan.

frame; a hollow chamber in said frame forming a main oil reservoir,having a side wall opening l against the underside of theftop forpartial distri- I reservoir to said distributor pan.

bution by said vane; an upper oil reservoir near the point of eductionadapted to collect oil which drops from the top; a distributor panoverlying said main drive shafts; a plurality of spouts in saiddistributor pan overlying individual cranks on the main drive' shaft;and means 'for conducting oil from said upperoil reservoir to said distributar pan.

17. In a sewing machine the combination of a frame; a hollow chamber insaid frameV forming a main oil reservoir; a top for said chamber;`an'oll directing vane on said top; a main drive shaft with cranks; loweroperating rods having oil entrance apertures; channels in said chamberfor conducting oil' to said oil entrance apertures;

means for lifting oil from said reservoir and.

educting it against the underside of thetop for partial distribution bysaid vane; an upper oil reservoir near the pointof eduction 4adapted tocollect oil which-.drops from the top; a distributor pan overlying saidmain'drive shaft; a plurality of spouts in said rdistributor panoverlying individual cranks on the main drive shaft; and means forconducting oil from said upper oil reservoir to said distributor pan'.

18. In a sewing machine lthe combination of a frame; a hollow chamber insaid frame forming a main oil reservoir; a top for said chamber; an oildirecting vane on said top; a. main drive shaft with cranks; loweroperating rods having oil entrance apertures;I channels in said chamberfor conducting oil-to said oilentrance apertures; a- -pump\ for liftingoil from said reservoir and' educting it against thev underside ofthetopforv partial distribution by said vane; a reciprocating rod forperforming main operating functions in` the sewing machineand adapted toperform the ancillary f ction of a plunger for the pump; an upper oil rservoir 'near the point 'of eduction adapted to collect oil lwhichdrops.from the top; a distributor;l pan overlying said main drive-shaft;

'a plurality of spo'uts in said distributor pan overlying individualcranks on the main drive shaft; and means. for conducting oil from saidupper oil 19. In a sewing machine thecoinblnation'of-a; frame; a hollowchamber' in saidA frame forming ,I amain `oil reservoir; a top AforVsaid chamber; a main drive shaft'with cranks; and .upper main operatinginstrumentality'disposed remotely from 16. a sewing machine thecombination of a underside of the top; means for conducting a part 5 ofsaid educted oil to said upper operating instrumentality and said lowerinstrumentality; an v upper oil reservoir near the point of eductionadapted to collect oil which drops from the top;

a distributor pan overlying said main drive shaft 10 a plurality ofspouts in said distributor pan overlying individual cranks on the mainvdrive shaft;

and means for conducting oil from said upper oil reservoir to saiddistributor pan.

20. In a sewing machine the combination of a 15 frame; a hollow chamberin said frame forming a mainoil reservoir; va top for saidchamber; anoil conducting vane on said top; a main drive shaft with cranks; anupper operating rod disposed remote from and above said main drive 20shaftand having an oil entrance aperture; lower operating rods disposedbelow the main drive shaft and having oil entrance apertures; channelsin said chamber for conducting oil to the oil entrance apertures in saidupper and lower cperat- 25 ing rods; means for'lifting oil from said-main reservoir and educting it against the undersideof said top forpartial distribution by said vane to said channels; an upper oilreservoir near the point of eduction adapted to collect oil! which 30drops from the top; a distributorpan ovierlying said main drive shaft; aplurality of spouts in said distributor pan overlying individual crankson the main drive'shaft; and means for conducting oi1 from said upperoil reservoir to distributor pan.

21. In a sewing machine the combination of a frame for supportingoperating connections; a rocking rod supported by said frame to actuatea .main operating instrumentality; a. hollow means for distributing oilto the operating con-yvnections; a pump in said hollow chamber havin aplunger for lifting oil to said distributing means; and a nger on saidrocking rod overlying the plunger and adapted to perform theauxiliary-.function of operating thel pumpwhile onsaid drive shaft; anoperating rod for a main operating instrumentality; a pump in saidhollow chamber; and means having only one connection to only one crankon the main drive slPaft adapted to concurrently operate the rod. andmain instrumentality and to operate the pump. v

23. In-a sewing machine the combination of .a

frame for supporting operating instrumentalities anddriving connections;a reservoir for lubricant; a. pressure chamber in said frame incommunication with said reservoir; a hollow operating rod for operatinga sewing instrumentality, having an oil escape hole and extending intosaid said 35 40 chamber 1n said frame, forming an oil reservoir; f

pressure chamber; a bearing for' said rod; a valve 65 in said rodcontrolling the flow of lubricant from the pressure chamber; and meansfor reciprocating. said hollow rod' to draw lubricant from saidreservoir and into said pressurechamber and to force the same into the`rod and' through the 70 escape hole .to the bearing. i

JOHN P. wm's.

